ICD-10-CM > S00-T88 > T20-T25 > T22 > T22.2 > T22.23 > T22.239 T22.239 Burn of second degree of unspecified upper arm Non-Billable/Non-Specific Codes T22.239A..., initial encounterT22.239D..., subsequent encounterT22.239S..., sequela